Zcash founder Zooko Wilcox said a security audit conducted by Anthropic’s Claude Mythos artificial intelligence model found no major vulnerabilities in the privacy-preserving cryptocurrency’s protocol.

According to Saturday post by Wilcox.

On June 3, Zcash developers temporarily suspended Orchard transactions after discovering a vulnerability in the protected pool. Functionality was restored later that day via an emergency update.

The issue stemmed from a four-year-old tampering bug in the protected Orchard Pool, which was discovered by security researcher Taylor Hornby using Anthropic’s Claude Opus 4.8 model. Zcash Foundation he said there was no evidence of exploitation of the vulnerability and no unauthorized value creation was detected, and user privacy was not compromised.

Source: Zooko Wilcox

AI models raise concerns about cryptocurrency security

While developers are using modern AI models to identify vulnerabilities, the technology is also raising security concerns across the crypto industry.

On Tuesday, Anthropic released the first public version of its Claude Mythos model, Fable 5. Last month, the company said the Mythos model had discovered more than 10,000 high- or critical-severity vulnerabilities in “systemically important software,” raising concerns about whether it should be made public.

Business he said users that Fable 5 has been “secured for general use” and has protections that redirect certain topics, such as cybersecurity, to a different model, Claude Opus 4.8.

On Friday, Anthropic said it had suspended access to its Fable 5 and Mythos 5 AI models due to the U.S. government’s export control directive, citing national security concerns.

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The proliferation of these modern AI models has shifted the cybersecurity playing field in favor of threat actors, creating a “vulnerability apocalypse” that is fueling a resurgence of decentralized finance (DeFi) hacks, Mitchell Amador, CEO of bug bounty platform Immunefi, said in a recent interview with Cointelegraph.

According to DefiLlama, cryptocurrency hacks rose to $634 million in April, the highest monthly figure since the Bybit hack that led to losses of approximately $1.4 billion in February 2025 data.

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